Method of and means for permanently waving hair



Dec. 27, R. L. EVANS 1,892,390

METHOD OF AND mums FOR PERMANENTLY WAVING HAIR Original Filed Jan. 21, 1932 Fly 2. v

INVENTOR ATTORNEYS Y the inner Patented Dec. 27, 1932 UNITED STATES PATENT orric RALPH L. EVANS, OF NEW YORK, N. Y., ASSIGNOB TO ZOTOS CORPORATION, OF NEW YORK, N. Y., A CORPORATION OF NEW YORK METHOD OF AND MEANS FOR PERMANENTLY WAVING HAIR Original application filed September 21, 1932, Serial No. 634,132, which is in turn a division of application, Serial No. 587,8, filed January 21, 1932. Divided and this application filed November 11, 1932. Serial This invention relates to that class of hair waving in which a so called permanent wave is imparted to a pre-formed tress of hair by subjecting the tress to the action of a heating chemical, such as calcium oxide, which, when moistened, will of itself generate s fficient heat to impart a permanent wave to the said. tress.

This invention com rises a novel method of and a novel means or controlling the development of the heat generated by the self heating chemical wherein certain materials are used to accelerate the development of the eat.

I have found that the development of the heat generated by the reaction of the self heating chemical with its moistening solution may be accelerated, as for instance by the use of an acidic material in the solution used to moisten the heating chemical. For example, aluminum sulphate. It is to be understood that the heating chemical may be used in its dry powdered state or that it may be pressed into easily friable cakes, in which case a suitable binder such as dry glycerin,-etc. may be used.

An example of a hair waving pad embodying my invention is represented in the accompanying drawing, in which:

Fig. 1 represents an inside plan view of the pad in its unwrapped condition, the inner absorbent sheet being shown at the side of the pad and the inner wrapper sheetbeing shown unfolded;

Fig. 2 represents an inside plan view of the pad in its unwrapped condition after the inner wrapper fla has been perforated and ace of t e chemical containing envelope has been perforated, the inner absorbent sheet being shown interposed between the inner face of the heating chemical containing envelope and the inner wrapper flap;

ig. 3 represents a side view of the pad wrapped around a wound tressas in use; and

Fig. 4 represents a longitudinal central section through the wrapped pad.

The outer wrapper of the hair waving pad is denoted by 1 and is preferably made of non-absorbent material, as for instance paper. The inner wrapper is denoted by 2 and is preferably made of metal foil. This inner wrapper is provided with a foldable flap 3. An envelope 4 composed of a perforable impervious material, such as metal foil, is attached to the inner face of the inner wrapper 2, which envelope contains a heating chemical, such as calcium oxide in powdered form, which chemical, when moistened, will of itself generate sufiicient heat to impart a so called permanent wave to a pre-formed tres's when enclosed within the pad.

An inner removable sheet 5 of absorbent material, such as cotton fabric is arranged to be moistened and inserted between the flap 3 and the envelope 4 after the inner face of the envelope 4 and the folded over, flap 3 of the inner wrapper have been perforated. The pressing of the flap back into place will squeeze the moisture from the wetted inner sheet into the envelope containing the heating chemical.

In practice, the tress 6 is wound as usual around a mandrel 7. The tress may be moistened either before or after it is wound, by a suitable waving solution, such for instance as an ammonia solution. The inner face of the impervious envelope 4 containing the hair waving chemical is perforated as shown at 8, and the folded over flap 3 of the inner wrapper may be perforated at the same t me as shown at 9. The inner sheet 5 is moistened by water or by a suitable hair waving solution, such as that used for momtening the tress 6.

The water or solution may be treated to produce the results hereinbefore set forth.

The pad is then wrapped around the preformed tress and is preferably secured in position at the scalp end of the tress b a suitable scalp protecting guard of wel known or approved form, such for instance as the self locking guard 10 shown in the accompanying drawing. The outer end of the pad may be secured around the mandrel 7, as for instance by twisting the outer wrapper of the pad around the same. The exothermic action starts at once because of the application of moistureby the wetted inner sheet 100 5 of the pad to the self heating chemical through the perforations in the inner face of the impervious envelope. A regulable heat is then set up within the pad in order to impart a so called permanent wave to the preformed tress without requiring applica tion of heat from an outside source. It will be seen that the outside wrapper of the pad serves to confine the heat to a large extent Within the pad, the steam generated by the combination of the treating solution with the chemical being permitted to escape through the crimped outer end of the outer wrapper.

This application is a division of my copending application filed September 21,1932, Serial No. 634,132, which is in turn a divisition of my copending application filed J anuary 21, 1932, Serial No. 587,890.

lVhat I claim is:

1. Imparting a permanent wave to hair by subjecting the hair to heat generated by the reaction of an exothermic material with a moistening medium, the development of the heat being accelerated by combining a suitable medium with the moistening medium.

2. Imparting a permanent wave to hair by subjecting the hair to heat generated by the reaction of an exothermic material with a moistening medium, the development of the heat being accelerated by combining an acidic material with the moistening medium.

3. Imparting a permanent wave to hair by subjecting the hair to heat generated by the reaction of an exothermic material with a moistening medium, the development of the heat being accelerated by combining aluminum sulphate with the moistening medium.

4. Means for waving hair including a chemical which, when moistened, will generate suflicient heat to impart a permanent wave to the hair, a material being combined with the moistening medium for accelerating the development of the heat.

5. Means for waving hair including a chemical which, when moistened, will generate suflicient heat to impart a permanent wave to the hair, an acidic material being combined with the moisteningmedinm for accelerating the development of the heat.

6. Means for waving hair including a chemical which, when moistened, will generate sui'ficient heat to impart a permanent wave to the hair, aluminum sulphate being combined with the moistening medium for accelerating the development of the heat.

In testimony, that I claim the foregoing as my invention, I have signed my name this 28th day of October, 1932.

RALPH L. EVANS. 

